<template>
  <div>
    <div class="search">
      <input v-model="keyword" class="search-input" type="text" placeholder="输入城市名或拼音">
    </div>
    <div class="search-content" ref="search" v-show="keyword">
      <ul>
        <li class="search-item" v-for="item of list" :key="item.id" @click="handleCityClick(item.name)">{{item.name}}</li>
        <li class="search-item" v-show="hasNoData">没有找到匹配的数据</li>
      </ul>
    </div>
  </div>
</template>

<script>
import BScroll from 'better-scroll'
import { mapMutations } from 'vuex'
export default {
  name: 'CitySearch',
  props: {
    cities: Object
  },
  data () {
    return {
      keyword: '',
      list: [],
      timer: null
    }
  },
  methods: {
    handleCityClick (city) {
      this.changeCity(city)
      this.$router.push('/')// 点击完直接跳转首页
    },
    ...mapMutations(['changeCity'])
  },
  computed: {
    hasNoData () {
      return !this.list.length
    }
  },
  watch: {// 监听器
    keyword () {
      if (this.timer) {
        clearTimeout(this.timer)
      }
      if (!this.keyword) {
        this.list = []
        return
      }
      this.timer = setTimeout(() => {
        const result = []
        for (let i in this.cities) {
          this.cities[i].forEach((value) => {
            if (value.spell.indexOf(this.keyword) > -1 ||
                value.name.indexOf(this.keyword) > -1) {
              result.push(value)
            }
          })
        }
        this.list = result
      }, 100)
    }
  },
  mounted () {
    this.scroll = new BScroll(this.$refs.search)
  }
}
</script>

<style scoped lang="stylus">
  @import '~styles/varibles.styl'
  ul {
    margin:0
    padding:.2rem
  }
  .search {
    height:1.7rem
    padding: 0 .2rem
    background: $bgColor
  }
  .search-input {
    box-sizing:border-box
    padding:0 .2rem
    width:100%
    height:1.5rem
    line-height:1.5rem
    text-align:center
    border-radius:.2rem
    color: #666
    border:none
  }
  .search-content {
    z-index: 1
    overflow:hidden
    position:absolute
    top:4.5rem
    left:.4rem
    right:.4rem
    bottom:0
    background: #eee
  }
  .search-item {
    line-height: 1.6rem
    color: #666
    padding-left:.2rem
    background: #fff
  }
</style>
